I'm just in Dragon Fort and i just have 3 Team members, because i always hoped i will found some cool Fakemon and now i saw these Denjuus! I'd really like to have them! Can I obtain them and when am I able to catch them?

If not: Is Murkrow obtainable? And again: where?

Thank you soo much 5 help. :3

PS: God damn this story is insanely cool!

No, I am afraid they are just sort of a new thing in poke world. That is why you cannot catch them.